Using Classic Outlook on Windows for personal email, calendar, and contact management
Well, all the above fixes didn't work for me, but what worked for me is creating totally different account on the PC.
I discovered that the Account Name, and Log-in Name where two different things. This led for having Users Folder having a different name, and log-in account different.
Just created different account with same log-in/account name, and Users' folder, and that resolved everything.